Officials have decided! According to a report, Indonesian commuters riding on the roofs of trains will be sprayed with colored liquid so that security officers can identify and arrest them.

Rush hours are the most stressful. Electric trains that link Indonesian capital to the towns nearby are full of passengers during rush hours, with many sitting on the roofs due to a lack of space inside or to avoid paying.

They have tried several methods to discourage them from doing so but all have failed. They have to resort to extreme measures. The railway company PT Kereta Api will from next week douse them with a colored liquid so that officers can identify them when they get off the train, the Jakarta Post said.

“We will confiscate their IDs and give them a ticket,” Kereta Api regional spokesman Akhmad Sujadi was quoted as saying.

“We will send a copy of the ticket to their family, their local neighborhood unit head, their employer, or, if they’re students, their headmasters,” added Sujadi, who described the move as “unique.”